4. You are mixing lemonade and fruit juice to make a festive beverage for your birthday party. The lemonade contains 48 grams of sugar per cup and the fruit juice contains 30 grams of sugar per cup. You are planning on filling enough punch bowls to hold a total of 150 cups of liquid, and your very picky best friend insists that the beverage you serve should have 35 grams of sugar per serving. How many cups of each beverage should you put into the mix?